|
|
|
#1
05-17-2011, 11:28 AM
|
||||
|
||||
How to demagnetize metal
Anyone have an idea how to build a demagnetizer? I have a saw I'm trying to sharpen and all the filings are sticking to a section of it which makes it really tough to work with.
__________________
--Martin '73 FJ40 - '85 FJ60 - '80 RN47 Hilux - '05 Tundra KDøGWM 
|
|
#2
05-17-2011, 11:39 AM
|
||||
|
||||
|
Google "degaussing coil"
http://www.kerrywong.com/2010/01/18/...gaussing-coil/ http://wiki.answers.com/Q/How_can_yo...a_demagnetizer
__________________
"The man who does not read has no advantage over the man who cannot read." -- Mark Twain
|
|
#3
05-17-2011, 11:42 AM
|
||||
|
||||
|
Drop it a few times if you can.
Some other ideas - I bet the Black Hole down in Los Alamos had something that would work for this purpose - too bad I'm not taking a trip down there anytime soon. http://www.groupsrv.com/hobby/about188239.html
__________________
Matt Miller "Stay the Trail," "Tread Lightly," and "Leave No Trace" ethics TLCA# 13684 Rising Sun Bio 1977 FJ40 2F "Brahma" + Lockright, tach, Warn 8274, Power Steering, and Sanden OBA!   2000 Tundra Limited TRD 2UZ-FE
|
|
#4
05-18-2011, 08:33 AM
|
||||
|
||||
|
Thanks for the info guys. Do you think a bulk tape degausser would be strong enough to demagnetize a sheet of steel? I found several on FleaBay cheap.
__________________
--Martin '73 FJ40 - '85 FJ60 - '80 RN47 Hilux - '05 Tundra KDøGWM
|
|
#5
05-18-2011, 08:50 AM
|
||||
|
||||
|
What kind of steel is it and how thick? A tape eraser probably won't be very strong, so my guess is no. How much are they going for on eBay? If it was me, I'd buy a 500-foot spool of 24AWG magnet wire and wind a monster one. Can't imagine a spool would be more than $20~$40. Other than a huge coil, a degausser is a switch and a plug. I would also put a 100W bulb in series (while you can still get them) to limit the current a little.
__________________
"The man who does not read has no advantage over the man who cannot read." -- Mark Twain
|
|
#6
05-18-2011, 08:52 AM
|
||||
|
||||
|
If you could something like this used:
http://www1.mscdirect.com/CGI/NNSRIT...MTERM=09041500 It'd probably work much better.
__________________
Bruce '96FZJ80 '03 KTM 450EXC "If you know what you're doing, then you aren't learning anything." - A. Lincoln
|
|
#7
05-18-2011, 08:54 AM
|
||||
|
||||
|
Bruce's link is to an industrial version of exactly what you need. It's $150.
That buys A LOT of magnet wire... http://bbs.homeshopmachinist.net/showthread.php?t=47853 If you want to experiment, I have a Variac you can use.
__________________
"The man who does not read has no advantage over the man who cannot read." -- Mark Twain
|
|
#8
05-18-2011, 12:47 PM
|
||||
|
||||
|
Heat it up to cherry glowing red
__________________
Rezarf <>< My rig... "Maude" 1976 FJ40 with some stuff and some leaks. 2001 Sequoia Limited with heated seats  My camping trailer build up thread. "You 80 guys are just a Sawzall away from nirvana." -Red Chili 
|
|
#9
05-18-2011, 07:24 PM
|
|||
|
|||
|
A coil of wire is the way to do it. The 100W lamp in series is also a plus. I dont know that the wire (depending on the length) would have enough resistance to keep a breaker from tripping. I would go with that one. Finding the wire is another story, since all copper and precious metals are ending up in a scrap yard. Even metal in use is getting ripped out by thieves these days.
|
 |
| Thread Tools | |
|
|
